Hereditary rickets is a sex-linked dominant trait that results in low levels of vitamin D. Which genotypes would result in someone having rickets? Select three options.

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

i just learnt this recently but i need to look through my notes again